JP2011143457A - Laser welding structure - Google Patents

Laser welding structure Download PDF

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Publication number
JP2011143457A
JP2011143457A JP2010007013A JP2010007013A JP2011143457A JP 2011143457 A JP2011143457 A JP 2011143457A JP 2010007013 A JP2010007013 A JP 2010007013A JP 2010007013 A JP2010007013 A JP 2010007013A JP 2011143457 A JP2011143457 A JP 2011143457A
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Prior art keywords
metal terminal
laser welding
housing
welding structure
lower metal
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Japanese (ja)
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Tetsuro Ishida
哲朗 石田
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Tyco Electronics Japan GK
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Tyco Electronics Japan GK
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Priority to JP2010007013A priority Critical patent/JP2011143457A/en
Priority to US13/006,000 priority patent/US8430699B2/en
Priority to CN2011100223326A priority patent/CN102185183A/en
Publication of JP2011143457A publication Critical patent/JP2011143457A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/029—Welded connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0221—Laser welding

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser welding structure that is free from adverse effect such as discoloration, deformation, and the like of a housing caused by fusion heat in laser welding, the laser welding structure being configured such that upper and lower metallic terminals are arranged in a housing groove in a state where the upper face of the surrounding housing is higher than the upper face of the upper metallic terminal. <P>SOLUTION: In the laser welding structure, the face 1b of a groove 1a facing the upper metallic terminal 2 includes an inclined surface, the inclined surface is inclined at an angle θ formed by a line S1, which connects with an intersection point L where the starting point of the inclined surface closest to the side wall of the lower metallic terminal 3 (in Fig.1, the upper edge C in the width direction of the lower metallic terminal 3) intersects with the upper face 1c of the housing 1, and an extension line S2 from the upper face of the lower metallic terminal 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、上側及び下側の２つの金属端子を上下に重ねてレーザ溶接され、それら上側及び下側の金属端子をハウジングの溝内に配置したレーザ溶接構造に関する。   The present invention relates to a laser welding structure in which two metal terminals on the upper side and the lower side are superposed on each other and laser welded, and the upper and lower metal terminals are arranged in a groove of a housing.

近年においては、例えば、ダイオード、リレーなどの電子部品のリード等の金属端子を、ハウジングに取り付けられた金属端子に接続した電子部品内装コネクタが知られている。
ここで、電子部品の金属端子をハウジングに取り付けられた金属端子に接続するに際しては、ハウジング側の金属端子を下側に、電子部品側の金属端子を上側にして重ねてレーザ溶接することが一般的に行われている。図５は、ハウジングに取り付けられた金属端子に電子部品の金属端子をレーザ溶接により接続する従来のレーザ溶接構造の一例を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。 In recent years, for example, an electronic component internal connector in which a metal terminal such as a lead of an electronic component such as a diode or a relay is connected to a metal terminal attached to a housing is known.
Here, when connecting the metal terminal of the electronic component to the metal terminal attached to the housing, it is common to perform laser welding with the metal terminal on the housing side facing down and the metal terminal on the electronic component side facing up Has been done. FIG. 5 shows an example of a conventional laser welding structure in which a metal terminal of an electronic component is connected to a metal terminal attached to a housing by laser welding, and (A) is a schematic perspective view schematically showing a main part. B) is a cross-sectional view of the state cut in the width direction of the metal terminal in (A).

図５に示すレーザ溶接構造は、絶縁性のハウジング１０１の上面１０１ｃ上に該上面１０１ｃに沿うように下側金属端子１０３を取り付けている。そして、図５（Ａ）、（Ｂ）に示すように、電子部品の上側金属端子１０２を下側金属端子１０３に重ねてレーザ溶接して上側金属端子１０２を下側金属端子１０３上に接合している。下側金属端子１０３及び上側金属端子１０２の接合部分は、図５（Ａ）に示すように、長手方向に延びる細長形状となっている。図５（Ｂ）に示すように、下側金属端子１０３の幅Ｗ２は上側金属端子の幅Ｗ１よりも幅広となっている。また、レーザ光線ＬＢの照射径はＤとなり、この照射径Ｄの大きさは、下側金属端子１０３の幅Ｗ２よりも小さく上側金属端子１０３の幅Ｗ１よりも大きくなっている。照射径Ｄをこのように設定することにより、上側金属端子１０２と下側金属端子１０３とが適切に融着する。   In the laser welding structure shown in FIG. 5, the lower metal terminal 103 is attached on the upper surface 101 c of the insulating housing 101 along the upper surface 101 c. Then, as shown in FIGS. 5A and 5B, the upper metal terminal 102 of the electronic component is overlapped with the lower metal terminal 103 and laser welded to join the upper metal terminal 102 onto the lower metal terminal 103. ing. As shown in FIG. 5A, the joint portion between the lower metal terminal 103 and the upper metal terminal 102 has an elongated shape extending in the longitudinal direction. As shown in FIG. 5B, the width W2 of the lower metal terminal 103 is wider than the width W1 of the upper metal terminal. The irradiation diameter of the laser beam LB is D, and the irradiation diameter D is smaller than the width W2 of the lower metal terminal 103 and larger than the width W1 of the upper metal terminal 103. By setting the irradiation diameter D in this way, the upper metal terminal 102 and the lower metal terminal 103 are appropriately fused.

図５に示すレーザ溶接構造によれば、上側金属端子１０２と下側金属端子１０３とが適切に融着するのみならず、融着時の熱によってハウジング１０１が変色、変形等の悪影響を受けることはない。なぜなら、下側金属端子１０３が平坦形状のハウジング１０１の上面１０１ｃ上に該上面１０１ｃに沿うように取り付けられて上側金属端子１０２と下側金属端子１０３の接合部分の周囲（側部）にハウジング１０１が存在しないからである。   According to the laser welding structure shown in FIG. 5, not only the upper metal terminal 102 and the lower metal terminal 103 are appropriately fused, but also the housing 101 is adversely affected by discoloration, deformation, etc. due to heat at the time of fusion. There is no. This is because the lower metal terminal 103 is mounted on the upper surface 101 c of the flat housing 101 so as to be along the upper surface 101 c, and the housing 101 is disposed around the side (side portion) of the joint portion between the upper metal terminal 102 and the lower metal terminal 103. Because there is no.

しかしながら、下側金属端子１０３を平坦形状のハウジング１０１の上面１０１ｃ上に該上面１０１ｃに沿うように取り付ける技術は、上面１０１ｃにおける下側金属端子３の位置決めが困難であるので、一般的に組立困難とされている。このため、この技術は、電気コネクタを製造する際に用いられないことが多い。また、多数の下側金属端子１０３をハウジング１０１に配置する場合、互いに隣接する下側金属端子１０３間に絶縁物（ハウジング）が存在しないため、短絡のおそれがある。このため、隣接する下側金属端子１０３間のピッチを大きくする必要があり、電子部品内装コネクタ全体の小型化が図れない。   However, in the technique of attaching the lower metal terminal 103 to the upper surface 101c of the flat housing 101 along the upper surface 101c, it is difficult to position the lower metal terminal 3 on the upper surface 101c. It is said that. For this reason, this technique is often not used when manufacturing electrical connectors. Further, when a large number of lower metal terminals 103 are arranged in the housing 101, there is no possibility of a short circuit because there is no insulator (housing) between the lower metal terminals 103 adjacent to each other. For this reason, it is necessary to increase the pitch between the adjacent lower metal terminals 103, and the entire electronic component-internal connector cannot be reduced in size.

そこで、電気コネクタの製造においては、図６に示すように、下側金属端子１０３及び上側金属端子１０２をハウジング１０１の上面１０１ｃに形成された溝１０１ａに配置する構造が従来採用されている。図６は、ハウジングに取り付けられた金属端子に電子部品の金属端子をレーザ溶接により接続する従来のレーザ溶接構造の他の例を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。   Therefore, in the manufacture of the electrical connector, a structure in which the lower metal terminal 103 and the upper metal terminal 102 are disposed in the groove 101a formed on the upper surface 101c of the housing 101 is conventionally employed as shown in FIG. FIG. 6 shows another example of a conventional laser welding structure in which a metal terminal of an electronic component is connected to a metal terminal attached to a housing by laser welding, and (A) is a schematic perspective view schematically showing a main part. (B) is sectional drawing of the state cut | disconnected in the width direction of the metal terminal in (A).

図６に示すレーザ溶接構造においては、絶縁性のハウジング１０１に形成された溝１０１ａ内に下側金属端子１０３を取り付けている。溝１０１ａは、下側金属端子１０３の形状に対応するように長手方向に延びる形状をなしている。下側金属端子１０３の溝１０１ａ内への取り付けに際しては、圧入やインサートモールドといった技術が用いられている。そして、電子部品の上側金属端子１０２を下側金属端子１０３に重ねてレーザ溶接して上側金属端子１０２を下側金属端子１０３上に接合している。ここで、図６（Ａ）、（Ｂ）に示すように、上側金属端子１０２の上面１０２ａよりも周囲のハウジング１０１の上面１０１ｃが高い状態で、上側金属端子１０２及び下側金属端子１０３がハウジング１０１の溝１０１ａ内に配置される。   In the laser welding structure shown in FIG. 6, the lower metal terminal 103 is attached in the groove 101 a formed in the insulating housing 101. The groove 101 a has a shape extending in the longitudinal direction so as to correspond to the shape of the lower metal terminal 103. For mounting the lower metal terminal 103 into the groove 101a, techniques such as press fitting and insert molding are used. The upper metal terminal 102 of the electronic component is superimposed on the lower metal terminal 103 and laser welded to join the upper metal terminal 102 onto the lower metal terminal 103. Here, as shown in FIGS. 6A and 6B, the upper metal terminal 102 and the lower metal terminal 103 are the housing in a state where the upper surface 101 c of the surrounding housing 101 is higher than the upper surface 102 a of the upper metal terminal 102. 101 is disposed in the groove 101a.

なお、図６（Ｂ）に示すように、下側金属端子１０３の幅Ｗ２は上側金属端子１０２の幅Ｗ１よりも幅広となっている。また、レーザ光線ＬＢの照射径はＤとなり、この照射径Ｄの大きさは、下側金属端子１０３の幅Ｗ２よりも小さく上側金属端子１０２の幅Ｗ１よりも大きくなっている。また、溝１０１ａの開放部の幅Ｗ３は下側金属端子１０３の幅Ｗ２と同じであると共にレーザ光線ＬＢの照射径Ｄよりも大きくなっている。   As shown in FIG. 6B, the width W 2 of the lower metal terminal 103 is wider than the width W 1 of the upper metal terminal 102. The irradiation diameter of the laser beam LB is D, and the irradiation diameter D is smaller than the width W2 of the lower metal terminal 103 and larger than the width W1 of the upper metal terminal 102. The width W3 of the open portion of the groove 101a is the same as the width W2 of the lower metal terminal 103 and is larger than the irradiation diameter D of the laser beam LB.

図６に示すレーザ溶接構造によれば、下側金属端子１０３を溝１０１ａ内へ圧入やインサートモールドといった技術により容易に取り付けることができる。また、多数の下側金属端子１０３をハウジング１０１に配置する場合、互いに隣接する下側金属端子１０３間に絶縁物が存在するため、短絡のおそれはなく、狭ピッチ化が図られる、これにより、電子部品内装コネクタ全体の小型化を図ることができる。   According to the laser welding structure shown in FIG. 6, the lower metal terminal 103 can be easily attached into the groove 101a by a technique such as press fitting or insert molding. Further, when a large number of lower metal terminals 103 are arranged in the housing 101, there is an insulator between the lower metal terminals 103 adjacent to each other, so there is no risk of short circuit, and a narrow pitch is achieved. The entire electronic component internal connector can be reduced in size.

また、上側金属端子及び下側金属端子を上下重ねてレーザ溶接により接続する従来のレーザ溶接構造の別の例として、例えば、図７に示すものも知られている（特許文献１参照）。図７は、従来のレーザ溶接構造の別の例の斜視図である。
図７に示すレーザ溶接構造は、電気接続箱（図示せず）に収容するバスバー（下側金属端子）２０１上にタブ端子２０２の曲げしろ部２０２ａをレーザ溶接により接合するものである。
レーザ溶接に際しては、タブ端子２０２の曲げしろ部２０２ａに薄肉部２０２ｂ〜２０２ｄを形成し、これら薄肉部２０２ｂ〜２０２ｄに斜め方向からレーザ光線ＬＢを照射する。 As another example of a conventional laser welding structure in which an upper metal terminal and a lower metal terminal are overlapped and connected by laser welding, for example, the one shown in FIG. 7 is also known (see Patent Document 1). FIG. 7 is a perspective view of another example of a conventional laser welding structure.
The laser welding structure shown in FIG. 7 joins a bending margin 202a of a tab terminal 202 on a bus bar (lower metal terminal) 201 accommodated in an electric connection box (not shown) by laser welding.
At the time of laser welding, thin portions 202b to 202d are formed on the bending portion 202a of the tab terminal 202, and the thin portions 202b to 202d are irradiated with a laser beam LB from an oblique direction.

特開平１１−２１５６５２号公報JP-A-11-215652

しかしながら、図６及び図７に示すレーザ溶接構造にあっては、以下の問題点があった。
即ち、図６に示すレーザ溶接構造の場合、レーザ光線ＬＢを照射して上側金属端子１０２と下側金属端子１０３とが融着する際に、その熱によってハウジング１０１の溝１０１ａの両側壁が変色、変形等を起こしてしまうことがある。具体的には、図６（Ａ）に示すように、ハウジング１０１の溝１０１ａ両側壁のうち、レーザ光線ＬＢが照射されて上側金属端子１０２が溶け出す部位に対応する対向している領域Ａ及びＡ’が融着熱によって変色、変形等を起こしてしまうことがある。 However, the laser welding structure shown in FIGS. 6 and 7 has the following problems.
That is, in the case of the laser welding structure shown in FIG. 6, when the upper metal terminal 102 and the lower metal terminal 103 are fused by irradiating the laser beam LB, both side walls of the groove 101 a of the housing 101 are discolored by the heat. May cause deformation and the like. Specifically, as shown in FIG. 6 (A), the opposing region A corresponding to the portion where the laser beam LB is irradiated and the upper metal terminal 102 melts out of both side walls of the groove 101a of the housing 101 and A ′ may be discolored or deformed by heat of fusion.

また、図７に示すレーザ溶接構造の場合、バスバー２０１がハウジング上に沿って配置されるか、ハウジングの溝内に配置されるか明確に記載されていない。バスバー２０１がハウジング上に沿って配置される場合には、融着時の熱によってハウジングが変色、変形等を起こしてしまうおそれはないが、装置が大型化してしまうおそれがある。また、バスバー２０１がハウジングの溝内に配置されハウジングがバスバー２０１やタブ端子２０２を囲む場合には、融着時の熱によってハウジングが変色、変形等を起こしてしまうおそれがある。   Moreover, in the case of the laser welding structure shown in FIG. 7, it is not clearly described whether the bus bar 201 is arranged along the housing or in the groove of the housing. When the bus bar 201 is arranged along the housing, there is no risk that the housing will be discolored or deformed by heat at the time of fusion, but the apparatus may be increased in size. Further, when the bus bar 201 is disposed in the groove of the housing and the housing surrounds the bus bar 201 or the tab terminal 202, the housing may be discolored or deformed by heat at the time of fusion.

従って、本発明はこれらの問題点に鑑みてなされたものであり、その目的は、上側の金属端子の上面よりも周囲のハウジングの上面が高い状態で、上側及び下側の金属端子がハウジングの溝内に配置されたレーザ溶接構造において、レーザ溶接時の融着熱によってハウジングが変色、変形等の悪影響を受けることのないレーザ溶接構造を提供することにある。   Therefore, the present invention has been made in view of these problems. The object of the present invention is to make the upper and lower metal terminals of the housing higher than the upper surface of the upper metal terminal. An object of the present invention is to provide a laser welding structure in which a housing is not adversely affected by discoloration, deformation or the like due to heat of fusion during laser welding in a laser welding structure arranged in a groove.

上記目的を達成するために、本発明のうち請求項１に係るレーザ溶接構造は、下側に幅広の金属端子を、上側に前記下側の金属端子よりも幅狭の金属端子を上下に重ねてレーザ溶接され、周囲のハウジングの上面が前記上側の金属端子の上面よりも高い状態で、前記上側及び下側の金属端子が前記ハウジングの溝内に配置されたレーザ溶接構造において、前記溝の、前記上側の金属端子に臨む面が傾斜面を含み、該傾斜面は、前記下側の金属端子の側壁に最も近い前記傾斜面の始点と前記ハウジングの上面との交点とを結ぶ線と、前記下側の金属端子の上面からの延長線とのなす角度θで傾斜していることを特徴としている。   In order to achieve the above object, in the laser welding structure according to claim 1 of the present invention, a wide metal terminal is stacked on the lower side, and a metal terminal narrower than the lower metal terminal is stacked on the upper side. In the laser welding structure in which the upper and lower metal terminals are arranged in the groove of the housing in a state where the upper surface of the surrounding housing is higher than the upper surface of the upper metal terminal, A surface facing the upper metal terminal includes an inclined surface, and the inclined surface is a line connecting the intersection of the starting point of the inclined surface closest to the side wall of the lower metal terminal and the upper surface of the housing; It is characterized in that it is inclined at an angle θ formed with an extension line from the upper surface of the lower metal terminal.

また、本発明のうち請求項２に係るレーザ溶接構造は、請求項１記載のレーザ溶接構造において、前記角度θが１５°以上７５°以下であることを特徴としている。
また、本発明のうち請求項３に係るレーザ溶接構造は、請求項１又は２記載のレーザ溶接構造において、前記溝の、前記上側の金属端子に臨む面のうち前記角度θで傾斜している前記傾斜面が、平面からみて前記上側及び下側の金属端子のレーザ溶接部分に対応する部分の位置のみに形成されていることを特徴としている。 The laser welded structure according to claim 2 of the present invention is the laser welded structure according to claim 1, characterized in that the angle θ is not less than 15 ° and not more than 75 °.
Moreover, the laser welding structure according to claim 3 of the present invention is the laser welding structure according to claim 1 or 2, wherein the groove is inclined at the angle θ of the surface of the groove facing the upper metal terminal. The inclined surface is formed only at positions corresponding to laser welded portions of the upper and lower metal terminals as viewed from above.

本発明のうち請求項４に係るレーザ溶接構造は、請求項１乃至３のうちいずれか一項に記載のレーザ溶接構造において、前記溝の、前記上側の金属端子に臨む面は、下方向に凹状に湾曲していることを特徴としている。
更に、本発明のうち請求項５に係るレーザ溶接構造は、請求項３記載のレーザ溶接構造において、前記溝の、前記上側の金属端子に臨む面のうち前記角度θで傾斜している前記傾斜面が、平面からみて凹状に湾曲していることを特徴としている。 The laser welding structure according to claim 4 of the present invention is the laser welding structure according to any one of claims 1 to 3, wherein a surface of the groove facing the metal terminal on the upper side is downward. It is characterized by being curved in a concave shape.
Furthermore, the laser welded structure according to claim 5 of the present invention is the laser welded structure according to claim 3, wherein the inclined surface is inclined at the angle θ of the surface of the groove facing the upper metal terminal. The surface is characterized by being curved in a concave shape when viewed from the plane.

本発明に係るレーザ溶接構造によれば、ハウジングの溝の、上側の金属端子に臨む面が傾斜面を含み、該傾斜面は、下側の金属端子の側壁に最も近い前記傾斜面の始点と前記ハウジングの上面との交点とを結ぶ線と、前記下側の金属端子の上面からの延長線とのなす角度θで傾斜しているので、溝の、上側の金属端子に臨む面のうちレーザ光線が照射されて上側の金属端子が溶け出す部位に対応する部分が角度θで傾斜して熱源から遠くなる。このため、レーザ溶接時の融着熱によってハウジングの当該部分が変色、変形等の悪影響を受けることはない、レーザ溶接構造とすることができる。   According to the laser welding structure of the present invention, the surface of the housing groove facing the upper metal terminal includes an inclined surface, and the inclined surface is the starting point of the inclined surface closest to the side wall of the lower metal terminal. Since it is inclined at an angle θ formed by a line connecting the intersection point with the upper surface of the housing and an extension line from the upper surface of the lower metal terminal, the laser of the surface of the groove facing the upper metal terminal The portion corresponding to the portion where the upper metal terminal melts when irradiated with the light beam is inclined at an angle θ and is far from the heat source. For this reason, it can be set as the laser welding structure where the said part of a housing does not receive bad influences, such as discoloration and a deformation | transformation, by the heat of fusion at the time of laser welding.

そして、下側の金属端子を溝内へ圧入やインサートモールドといった技術により容易に取り付けることができる。また、多数の下側の金属端子をハウジングに配置する場合、互いに隣接する下側の金属端子間に絶縁物が存在するため、短絡のおそれはなく、狭ピッチ化が図られる。
また、ハウジングの溝の、傾斜面は、下側の金属端子の側壁に最も近い始点から傾斜しているから、溝による下側の金属端子の保持強度を低下させる要因とはならない。 Then, the lower metal terminal can be easily attached to the groove by a technique such as press fitting or insert molding. Further, when a large number of lower metal terminals are arranged in the housing, an insulator exists between the lower metal terminals adjacent to each other, so that there is no possibility of a short circuit and a narrow pitch can be achieved.
Further, since the inclined surface of the groove of the housing is inclined from the starting point closest to the side wall of the lower metal terminal, it does not cause a decrease in the holding strength of the lower metal terminal by the groove.

本発明に係るレーザ溶接構造の第一実施形態を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。1 shows a first embodiment of a laser welding structure according to the present invention, (A) is a schematic perspective view schematically showing a main part, (B) is a cross section in a state cut in the width direction of a metal terminal in (A). FIG. 本発明に係るレーザ溶接構造の第二実施形態を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。The 2nd embodiment of the laser welding structure concerning the present invention is shown, (A) is a schematic perspective view which showed the principal part typically, (B) is a section of the state where it cut in the width direction of a metal terminal in (A). FIG. 本発明に係るレーザ溶接構造の第三実施形態を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。3 shows a third embodiment of the laser welding structure according to the present invention, (A) is a schematic perspective view schematically showing the main part, (B) is a cross section in a state cut in the width direction of the metal terminal in (A). FIG. 本発明に係るレーザ溶接構造の第四実施形態を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。4 shows a fourth embodiment of the laser welding structure according to the present invention, (A) is a schematic perspective view schematically showing the main part, (B) is a cross-section in a state cut in the width direction of the metal terminal in (A). FIG. ハウジングに取り付けられた金属端子に電子部品の金属端子をレーザ溶接により接続する従来のレーザ溶接構造の一例を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。An example of the conventional laser welding structure which connects the metal terminal of an electronic component to the metal terminal attached to the housing by laser welding is shown, (A) is the schematic perspective view which showed the principal part typically, (B) is ( It is sectional drawing of the state cut | disconnected in the width direction of a metal terminal in A). ハウジングに取り付けられた金属端子に電子部品の金属端子をレーザ溶接により接続する従来のレーザ溶接構造の他の例を示し、（Ａ）は主要部を模式的に示した概略斜視図、（Ｂ）は（Ａ）において金属端子の幅方向に切断した状態の断面図である。The other example of the conventional laser welding structure which connects the metal terminal of an electronic component to the metal terminal attached to the housing by laser welding is shown, (A) is the schematic perspective view which showed the principal part typically, (B). FIG. 3A is a cross-sectional view of the metal terminal cut in the width direction in FIG. 従来のレーザ溶接構造の別の例の斜視図である。It is a perspective view of another example of the conventional laser welding structure.

以下、本発明の実施の形態を図面を参照して説明する。先ず、図１を参照して本発明に係るレーザ溶接構造の第一実施形態を説明する。
図１に示すレーザ溶接構造は、例えば、ダイオード、リレーなどの電子部品のリード等の上側金属端子２を、ハウジング１に取り付けられた下側金属端子３に接続してなる電子部品内装コネクタに用いられる。下側金属端子３は、ハウジング１及びコンタクト（図示せず）からなるコネクタのコンタクトの半田接続部又は接触部であってもよいし、或いは、コネクタの金属シェルのハウジングへの固定部分であってもよい。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a first embodiment of a laser welding structure according to the present invention will be described with reference to FIG.
The laser welding structure shown in FIG. 1 is used for an electronic component internal connector formed by connecting an upper metal terminal 2 such as a lead of an electronic component such as a diode or a relay to a lower metal terminal 3 attached to a housing 1. It is done. The lower metal terminal 3 may be a solder connection part or a contact part of a connector contact composed of the housing 1 and a contact (not shown), or may be a fixed part of the connector metal shell to the housing. Also good.

ここで、レーザ溶接構造は、下側に幅広の下側金属端子３を、上側に下側金属端子３よりも幅狭の上側金属端子２を上下に重ねてレーザ溶接されている。そして、周囲のハウジング１の上面１ｃが上側金属端子２ａの上面よりも高い状態で、上側金属端子２及び下側金属端子３がハウジング１の溝１ａ内に配置されている。
即ち、レーザ溶接構造において、絶縁性のハウジング１に形成された溝１ａ内に下側金属端子３を取り付けている。溝１ａは、下側金属端子３の形状に対応するように長手方向に延びる形状をなしている。下側金属端子３の溝１ａ内への取り付けに際しては、圧入やインサートモールドといった技術が用いられている。そして、電子部品の上側金属端子２を下側金属端子３に重ねてレーザ溶接して上側金属端子２を下側金属端子３上に接合している。ここで、前述のように、図１（Ａ）、（Ｂ）に示すように、上側金属端子２の上面２ａよりも周囲のハウジング１の上面１ｃが高い状態で、上側金属端子２及び下側金属端子３がハウジング１の溝１ａ内に配置される。
下側金属端子３及び上側金属端子２の接合部分は、図１（Ａ）に示すように、長手方向に延びる細長形状となっている。図１（Ｂ）に示すように、下側金属端子３の幅Ｗ２は上側金属端子の幅Ｗ１よりも幅広となっている。また、レーザ光線ＬＢの照射径はＤとなり、この照射径Ｄの大きさは、下側金属端子３の幅Ｗ２よりも小さく上側金属端子２の幅Ｗ１よりも大きくなっている。照射径Ｄをこのように設定することにより、上側金属端子２と下側金属端子３とが適切に融着する。 Here, the laser welding structure is laser-welded with the lower metal terminal 3 having a wide width on the lower side and the upper metal terminal 2 narrower than the lower metal terminal 3 on the upper side. The upper metal terminal 2 and the lower metal terminal 3 are disposed in the groove 1a of the housing 1 with the upper surface 1c of the surrounding housing 1 being higher than the upper surface of the upper metal terminal 2a.
That is, in the laser welding structure, the lower metal terminal 3 is attached in the groove 1 a formed in the insulating housing 1. The groove 1 a has a shape extending in the longitudinal direction so as to correspond to the shape of the lower metal terminal 3. For mounting the lower metal terminal 3 in the groove 1a, techniques such as press fitting and insert molding are used. The upper metal terminal 2 of the electronic component is overlapped with the lower metal terminal 3 and laser welded to join the upper metal terminal 2 onto the lower metal terminal 3. Here, as described above, as shown in FIGS. 1A and 1B, the upper metal terminal 2 and the lower metal terminal 2 and the lower metal terminal 2 are disposed in a state where the upper surface 1 c of the surrounding housing 1 is higher than the upper surface 2 a of the upper metal terminal 2. A metal terminal 3 is disposed in the groove 1 a of the housing 1.
As shown in FIG. 1A, the joint portion between the lower metal terminal 3 and the upper metal terminal 2 has an elongated shape extending in the longitudinal direction. As shown in FIG. 1B, the width W2 of the lower metal terminal 3 is wider than the width W1 of the upper metal terminal. The irradiation diameter of the laser beam LB is D, and the irradiation diameter D is smaller than the width W2 of the lower metal terminal 3 and larger than the width W1 of the upper metal terminal 2. By setting the irradiation diameter D in this way, the upper metal terminal 2 and the lower metal terminal 3 are appropriately fused.

そして、ハウジング１に形成された溝１ａの、上側金属端子２に臨む面１ｂは、図１（Ａ）、（Ｂ）に示すように、下側金属端子３の幅方向上端縁Ｃから角度θで傾斜している。すなわち、上側金属端子２に臨む面（傾斜面）１ｂは、図１（Ｂ）に示すように、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１と、下側金属端子３の上面から延びる線（延長線）Ｓ２とのなす角度θで傾斜している。これにより、溝１ａの開放部の最上縁の幅Ｗ３は、下側金属端子３の幅Ｗ２と同じに設定される溝１ａの下部の幅よりも大きくなる。上側金属端子２に臨む面１ｂは、図１（Ａ）、（Ｂ）に示すように、溝１ａの全長にわたって角度θで傾斜し、幅方向に横断する断面で見て直線状の平面で形成されている。   The surface 1b of the groove 1a formed in the housing 1 that faces the upper metal terminal 2 has an angle θ from the widthwise upper end edge C of the lower metal terminal 3, as shown in FIGS. It is inclined at. That is, the surface (inclined surface) 1b facing the upper metal terminal 2 has an intersection L between the upper edge C in the width direction end of the lower metal terminal 3 and the upper surface 1c of the housing 1, as shown in FIG. The connecting line S1 and the line (extension line) S2 extending from the upper surface of the lower metal terminal 3 are inclined at an angle θ. As a result, the width W3 of the uppermost edge of the open portion of the groove 1a is larger than the width of the lower portion of the groove 1a set to be the same as the width W2 of the lower metal terminal 3. As shown in FIGS. 1A and 1B, the surface 1b facing the upper metal terminal 2 is formed by a straight plane that is inclined at an angle θ over the entire length of the groove 1a and seen in a cross section transverse to the width direction. Has been.

このように、溝１ａの、上側金属端子２に臨む面１ｂを、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１と、下側金属端子３の上面から延びる線Ｓ２とのなす角度θで傾斜させる。これにより、上側金属端子２に臨む面１ｂのうちレーザ光線ＬＢが照射されて上側金属端子２が溶け出す部位に対応する部分（図６における領域Ａ，Ａ’に相当する部分）が角度θで傾斜して熱源（融着熱の熱源）から遠くなる。このため、レーザ溶接時の融着熱によってハウジング１が当該部分に変色、変形等の悪影響を受けることはない、レーザ溶接構造とすることができる。   In this way, the surface 1b of the groove 1a facing the upper metal terminal 2 is connected to the line S1 connecting the intersection L between the upper edge 1c in the width direction of the lower metal terminal 3 and the upper surface 1c of the housing 1, and the lower metal It is inclined at an angle θ formed with a line S2 extending from the upper surface of the terminal 3. As a result, the portion corresponding to the portion of the surface 1b facing the upper metal terminal 2 that is irradiated with the laser beam LB and the upper metal terminal 2 melts (portions corresponding to the regions A and A ′ in FIG. 6) is at an angle θ. Inclined and away from the heat source (heat source of fusion heat). For this reason, it can be set as the laser welding structure which the housing 1 does not receive the bad influence of discoloration, a deformation | transformation, etc. to the said part by the heat of fusion at the time of laser welding.

ここで、上側金属端子２の幅Ｗ１、下側金属端子３の幅Ｗ２、溝１ａの開放部の最上縁の幅Ｗ３、及びレーザ光線ＬＢの照射径Ｄの関係を整理すると、下記（１）式の関係となる。
Ｗ１＜Ｄ＜Ｗ２＜Ｗ３ …（１）
そして、（１）式の前提とした上で、上記角度θは、下記（２）式、すなわち１５°以上７５°以下に設定することが好ましい。
１５°≦θ≦７５° …（２）
角度θを１５°よりも小さくすると、前述した、上側金属端子２に臨む面１ｂのうちレーザ光線ＬＢが照射されて上側金属端子２が溶け出す部位に対応する部分が熱源から近くなり、ハウジング１の変色、変形等の回避効果が小さくなる。 Here, the relationship among the width W1 of the upper metal terminal 2, the width W2 of the lower metal terminal 3, the width W3 of the uppermost edge of the open portion of the groove 1a, and the irradiation diameter D of the laser beam LB is summarized as follows (1). It becomes relation of expression.
W1 <D <W2 <W3 (1)
Then, based on the premise of the formula (1), the angle θ is preferably set to the following formula (2), that is, 15 ° to 75 °.
15 ° ≦ θ ≦ 75 ° (2)
When the angle θ is smaller than 15 °, the portion corresponding to the portion where the laser beam LB is irradiated and the upper metal terminal 2 melts out of the surface 1b facing the upper metal terminal 2 is close to the heat source, and the housing 1 The effect of avoiding discoloration, deformation, etc. is reduced.

一方、角度θを７５°よりも大きくすると、互いに隣接する下側金属端子３間のピッチを大きくする必要があり、ハウジング1の小型化、電子部品内装コネクタ全体の小型化が図れない。
従って、角度θを１５°以上７５°以下に設定することが好ましい。角度θは、ハウジング１の変色、変形等を回避する効果と互いに隣接する下側金属端子３間のピッチをできるだけ小さくする要請とを考慮し、３０°以上６０°以下にすることがより好ましく、４０°以上５０°以下とすることが更に好ましく、４５°とすることが最も好ましい。
なお、上側金属端子２及び下側金属端子３がハウジング１の溝１ａ内に配置されるから、下側金属端子３を溝１ａ内へ圧入やインサートモールドといった技術により容易に取り付けることができる。また、互いに隣接する下側金属端子３間に絶縁物が存在するため、短絡のおそれはない。
また、ハウジング１の溝１ａの、上側金属端子２に臨む面１ｂは、下側金属端子３の幅方向端上縁Ｃから傾斜しているから、角度θで傾斜させることが、溝１ａによる下側金属端子３の保持強度を低下させる要因とはならない。 On the other hand, when the angle θ is larger than 75 °, it is necessary to increase the pitch between the lower metal terminals 3 adjacent to each other, and the housing 1 and the entire electronic component built-in connector cannot be reduced in size.
Therefore, it is preferable to set the angle θ to 15 ° or more and 75 ° or less. The angle θ is more preferably 30 ° or more and 60 ° or less in consideration of the effect of avoiding discoloration, deformation, and the like of the housing 1 and the request for making the pitch between the lower metal terminals 3 adjacent to each other as small as possible. The angle is more preferably 40 ° or more and 50 ° or less, and most preferably 45 °.
Since the upper metal terminal 2 and the lower metal terminal 3 are disposed in the groove 1a of the housing 1, the lower metal terminal 3 can be easily attached to the groove 1a by a technique such as press fitting or insert molding. Moreover, since an insulator exists between the lower metal terminals 3 adjacent to each other, there is no fear of a short circuit.
Further, since the surface 1b of the groove 1a of the housing 1 facing the upper metal terminal 2 is inclined from the upper edge C in the width direction end of the lower metal terminal 3, the inclination by the angle θ It does not cause a decrease in the holding strength of the side metal terminal 3.

次に、本発明に係るレーザ溶接構造の第二実施形態を図２を参照して説明する。
図２に示すレーザ溶接構造は、図１に示すレーザ溶接構造と基本的に同様の構成を有するが、溝１ａの、上側金属端子２に臨む面１ｂの形状が、図１に示す上側金属端子２に臨む面１ｂの形状と異なる点のみが相違している。
即ち、図１に示す上側金属端子２に臨む面１ｂの形状は、前述したように、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１と、下側金属端子３の上面から延びる線（延長線）Ｓ２とのなす角度θで傾斜している。そして、上側金属端子２に臨む面１ｂは、図１（Ａ）、（Ｂ）に示すように、溝１ａの全長にわたって角度θで傾斜し、幅方向に横断する断面で見て直線状の平面で形成されている。 Next, a second embodiment of the laser welding structure according to the present invention will be described with reference to FIG.
The laser welding structure shown in FIG. 2 has basically the same configuration as the laser welding structure shown in FIG. 1, but the shape of the surface 1b of the groove 1a facing the upper metal terminal 2 is the upper metal terminal shown in FIG. Only the difference from the shape of the surface 1b facing 2 is different.
That is, the shape of the surface 1b facing the upper metal terminal 2 shown in FIG. 1 is the line S1 connecting the upper edge C in the width direction end of the lower metal terminal 3 and the intersection L of the upper surface 1c of the housing 1 as described above. And an angle θ formed by a line (extension line) S <b> 2 extending from the upper surface of the lower metal terminal 3. Then, as shown in FIGS. 1A and 1B, the surface 1b that faces the upper metal terminal 2 is a straight plane that is inclined at an angle θ over the entire length of the groove 1a and seen in a cross section that crosses the width direction. It is formed with.

これに対して、図２に示す上側金属端子２に臨む面１ｂは、図２（Ｂ）に示すように、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１と、下側金属端子３の上面から延びる線（延長線）Ｓ２とのなす角度θで傾斜している。そして、上側金属端子２に臨む面１ｂは、図２（Ａ）、（Ｂ）に示すように、幅方向に横断する断面で見て下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１に対して下方向に凹状に湾曲している。この下方向に凹状に湾曲した状態は、溝１ａの全長にわたって続いている。   On the other hand, the surface 1b facing the upper metal terminal 2 shown in FIG. 2 is an intersection of the upper edge C in the width direction end of the lower metal terminal 3 and the upper surface 1c of the housing 1, as shown in FIG. It is inclined at an angle θ formed by a line S1 connecting L and a line (extension line) S2 extending from the upper surface of the lower metal terminal 3. The surface 1b facing the upper metal terminal 2 has an upper edge C in the width direction end of the lower metal terminal 3 and the housing 1 as seen in a cross section transverse to the width direction, as shown in FIGS. Is curved in a concave shape downward with respect to a line S1 connecting the intersection L with the upper surface 1c. This downwardly curved state continues over the entire length of the groove 1a.

このように、上側金属端子２に臨む面１ｂを、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１に対して下方向に凹状に湾曲させる。これにより、上側金属端子２に臨む面１ｂのうちレーザ光線ＬＢが照射されて上側金属端子２が溶け出す部位に対応する部分（図６における領域Ａ，Ａ’に相当する部分）が、図１に示すように直線状の平面で角度θで傾斜している場合より、より一層熱源（融着熱の熱源）から遠くなる。このため、レーザ溶接時の融着熱によってハウジング１が当該部分に変色、変形等の悪影響をより一層受けづらい、レーザ溶接構造とすることができる。   In this way, the surface 1b facing the upper metal terminal 2 is curved concavely downward with respect to the line S1 connecting the upper edge C of the width direction end of the lower metal terminal 3 and the upper surface 1c of the housing 1. Let As a result, a portion (corresponding to regions A and A ′ in FIG. 6) of the surface 1b facing the upper metal terminal 2 corresponding to a portion where the upper metal terminal 2 is melted by irradiation with the laser beam LB is shown in FIG. As shown in FIG. 4, the distance from the heat source (heat source for fusion heat) is further increased than when the surface is inclined at an angle θ on a linear plane. For this reason, the housing 1 is more unlikely to receive adverse effects such as discoloration and deformation due to heat of fusion during laser welding, and a laser welding structure can be obtained.

なお、上側金属端子２の幅Ｗ１、下側金属端子３の幅Ｗ２、溝１ａの開放部の最上縁の幅Ｗ３、及びレーザ光線ＬＢの照射径Ｄの関係は、上記した（１）式の関係である。
また、角度θは、上記した（２）式、すなわち１５°以上７５°以下に設定することが好ましく、３０°以上６０°以下にすることがより好ましく、４０°以上５０°以下とすることが更に好ましく、４５°とすることが最も好ましい。 The relationship among the width W1 of the upper metal terminal 2, the width W2 of the lower metal terminal 3, the width W3 of the uppermost edge of the open portion of the groove 1a, and the irradiation diameter D of the laser beam LB is expressed by the above equation (1). It is a relationship.
Further, the angle θ is preferably set to the above formula (2), that is, 15 ° to 75 °, more preferably 30 ° to 60 °, and more preferably 40 ° to 50 °. More preferably, the angle is 45 °.

また、本発明に係るレーザ溶接構造の第三実施形態を図３を参照して説明する。
図３に示すレーザ溶接構造は、図１に示すレーザ溶接構造と基本的に同様の構成を有する。しかし、図３に示すレーザ溶接構造は、溝１ａの、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分が、図１に示すものと異なっている。
即ち、図１に示す上側金属端子２に臨む面１ｂの形状は、前述したように、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１と、下側金属端子３の上面から延びる線（延長線）Ｓ２とのなす角度θで傾斜している。そして、上側金属端子２に臨む面１ｂは、図１（Ａ）、（Ｂ）に示すように、溝１ａの全長にわたって角度θで傾斜し、幅方向に横断する断面で見て直線状の平面で形成されている。 A third embodiment of the laser welding structure according to the present invention will be described with reference to FIG.
The laser welding structure shown in FIG. 3 has basically the same configuration as the laser welding structure shown in FIG. However, the laser welding structure shown in FIG. 3 differs from that shown in FIG. 1 in the portion of the surface 1b of the groove 1a that faces the upper metal terminal 2 that is inclined at an angle θ.
That is, the shape of the surface 1b facing the upper metal terminal 2 shown in FIG. 1 is the line S1 connecting the upper edge C in the width direction end of the lower metal terminal 3 and the intersection L of the upper surface 1c of the housing 1 as described above. And an angle θ formed by a line (extension line) S <b> 2 extending from the upper surface of the lower metal terminal 3. Then, as shown in FIGS. 1A and 1B, the surface 1b that faces the upper metal terminal 2 is a straight plane that is inclined at an angle θ over the entire length of the groove 1a and seen in a cross section that crosses the width direction. It is formed with.

これに対して、図３に示す上側金属端子２に臨む面１ｂは、図３（Ａ）、（Ｂ）に示すように、溝１ａの全長に対して一部分（傾斜面）１ｂ’のみが、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１と、下側金属端子３の上面から延びる線（延長線）Ｓ２とのなす角度θで傾斜している。そして、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分１ｂ’は、平面から見て上側金属端子２及び下側金属端子３のレーザ溶接部分に対応する部分の位置のみに形成されている。また、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分１ｂ’は、平面から見て台形状に切りかかれて形成され、図３（Ｂ）に示すように、幅方向に横断する断面で見て直線状の平面で形成されている。   In contrast, as shown in FIGS. 3A and 3B, the surface 1b facing the upper metal terminal 2 shown in FIG. At an angle θ formed by a line S1 connecting the upper edge C in the width direction of the lower metal terminal 3 and the intersection L of the upper surface 1c of the housing 1 and a line (extension line) S2 extending from the upper surface of the lower metal terminal 3 It is inclined. The portion 1b ′ inclined at an angle θ of the surface 1b facing the upper metal terminal 2 is located only at the position corresponding to the laser welded portion of the upper metal terminal 2 and the lower metal terminal 3 when viewed from the plane. Is formed. Further, a portion 1b ′ inclined at an angle θ of the surface 1b facing the upper metal terminal 2 is formed by being cut into a trapezoidal shape when viewed from the plane, and as shown in FIG. It is formed by a straight plane when viewed in a cross section.

このように、溝１ａの、上側金属端子２に臨む面１ｂを通常は角度θで傾斜させることなく、下方から垂直で立ち上げる。そして、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分１ｂ’を、平面から見て上側金属端子２及び下側金属端子３のレーザ溶接部分に対応する部分の位置のみに形成する。これにより、上側金属端子２に臨む面１ｂのうちレーザ光線ＬＢが照射されて上側金属端子２が溶け出す部位に対応する部分の近傍のみが、角度θで傾斜することになり、熱源から遠くなる。従って、上側金属端子２に臨む面１ｂのうち必要な部位にだけ角度θで傾斜させることになり、ハウジング１の小型化を図ることができる。   In this manner, the surface 1b of the groove 1a facing the upper metal terminal 2 is normally raised from below without being inclined at an angle θ. Then, the portion 1b ′ inclined at an angle θ of the surface 1b facing the upper metal terminal 2 is only at the position corresponding to the laser welded portion of the upper metal terminal 2 and the lower metal terminal 3 when viewed from the plane. Form. Thereby, only the vicinity of the part corresponding to the part where the laser beam LB is irradiated and the upper metal terminal 2 melts out of the surface 1b facing the upper metal terminal 2 is inclined at the angle θ, and is far from the heat source. . Therefore, only the necessary portion of the surface 1b facing the upper metal terminal 2 is inclined at the angle θ, and the housing 1 can be downsized.

なお、上側金属端子２の幅Ｗ１、下側金属端子３の幅Ｗ２、溝１ａの開放部の最上縁の幅Ｗ３、及びレーザ光線ＬＢの照射径Ｄの関係は、上記した（１）式の関係である。
また、角度θは、上記した（２）式、すなわち１５°以上７５°以下に設定することが好ましく、３０°以上６０°以下にすることがより好ましく、４０°以上５０°以下とすることが更に好ましく、４５°とすることが最も好ましい。 The relationship among the width W1 of the upper metal terminal 2, the width W2 of the lower metal terminal 3, the width W3 of the uppermost edge of the open portion of the groove 1a, and the irradiation diameter D of the laser beam LB is expressed by the above equation (1). It is a relationship.
Further, the angle θ is preferably set to the above formula (2), that is, 15 ° to 75 °, more preferably 30 ° to 60 °, and more preferably 40 ° to 50 °. More preferably, the angle is 45 °.

最後に、本発明に係るレーザ溶接構造の第四実施形態を図４を参照して説明する。
図４に示すレーザ溶接構造は、図３に示すレーザ溶接構造と基本的に同様の構成を有する。しかし、図４に示すレーザ溶接構造は、溝１ａの、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分1ｂ’が、図３に示すものと異なっている。
即ち、図３に示す上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分１ｂ’は、前述したように、平面から見て台形状に切りかかれて形成され、幅方向に横断する断面で見て直線状の平面で形成されている。 Finally, a fourth embodiment of the laser welding structure according to the present invention will be described with reference to FIG.
The laser welding structure shown in FIG. 4 has basically the same configuration as the laser welding structure shown in FIG. However, the laser welding structure shown in FIG. 4 is different from that shown in FIG. 3 in a portion 1b 'of the surface 1b of the groove 1a facing the upper metal terminal 2 and inclined at an angle θ.
That is, of the surface 1b facing the upper metal terminal 2 shown in FIG. 3, the portion 1b ′ inclined by the angle θ is formed by being cut into a trapezoidal shape when viewed from the plane and traversing in the width direction. The cross section is formed by a straight plane.

これに対して、図４に示す上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分１ｂ’は、図４（Ｂ）に示すように、幅方向に横断する断面で見て直線状の平面で形成されているが、平面から見て凹状に湾曲して形成されている。
このように、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分１ｂ’を平面から見て凹状に湾曲して形成することによっても図３に示すレーザ溶接構造と同様の効果を得ることができる。 On the other hand, a portion 1b ′ inclined at an angle θ of the surface 1b facing the upper metal terminal 2 shown in FIG. 4 is seen in a cross section transverse to the width direction as shown in FIG. Although it is formed of a straight plane, it is formed to be concavely curved when viewed from the plane.
Thus, the same effect as the laser welding structure shown in FIG. 3 can be obtained by forming the portion 1b ′ inclined at the angle θ of the surface 1b facing the upper metal terminal 2 in a concave shape when viewed from the plane. Can be obtained.

なお、図４に示す上側金属端子２に臨む面１ｂは、図３に示す面１ｂと同様に、図４（Ａ）、（Ｂ）に示すように、溝１ａの全長に対して一部分１ｂ’のみが、下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１と、下側金属端子３の上面から延びる線（延長線）Ｓ２とのなす角度θで傾斜している。そして、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分１ｂ’は、平面から見て上側金属端子２及び下側金属端子３のレーザ溶接部分に対応する部分の位置のみに形成されている。   The surface 1b facing the upper metal terminal 2 shown in FIG. 4 is partially 1b ′ with respect to the entire length of the groove 1a, as shown in FIGS. 4A and 4B, like the surface 1b shown in FIG. Only the line S1 connecting the upper edge C in the width direction of the lower metal terminal 3 and the intersection L of the upper surface 1c of the housing 1 and the line (extension line) S2 extending from the upper surface of the lower metal terminal 3 are formed. It is inclined at an angle θ. The portion 1b ′ inclined at an angle θ of the surface 1b facing the upper metal terminal 2 is located only at the position corresponding to the laser welded portion of the upper metal terminal 2 and the lower metal terminal 3 when viewed from the plane. Is formed.

また、上側金属端子２の幅Ｗ１、下側金属端子３の幅Ｗ２、溝１ａの開放部の最上縁の幅Ｗ３、及びレーザ光線ＬＢの照射径Ｄの関係は、上記した（１）式の関係である。
また、角度θは、上記した（２）式、すなわち１５°以上７５°以下に設定することが好ましく、３０°以上６０°以下にすることがより好ましく、４０°以上５０°以下とすることが更に好ましく、４５°とすることが最も好ましい。 Further, the relationship among the width W1 of the upper metal terminal 2, the width W2 of the lower metal terminal 3, the width W3 of the uppermost edge of the open portion of the groove 1a, and the irradiation diameter D of the laser beam LB is expressed by the formula (1) described above. It is a relationship.
Further, the angle θ is preferably set to the above formula (2), that is, 15 ° to 75 °, more preferably 30 ° to 60 °, and more preferably 40 ° to 50 °. More preferably, the angle is 45 °.

以上、本発明の実施形態について説明してきたが、本発明はこれに限定されずに種々の変更、改良を行うことができる。
例えば、下側に幅広の金属端子を、上側に前記下側の金属端子よりも幅狭の金属端子を上下に重ねてレーザ溶接するものであれば、本発明のレーザ溶接構造は、ダイオード、リレーなどの電子部品のリード等の上側金属端子２を、ハウジング１に取り付けられた下側金属端子３に接続してなる電子部品内装コネクタに用いられるものに限られない。 As mentioned above, although embodiment of this invention has been described, this invention is not limited to this, A various change and improvement can be performed.
For example, if laser welding is performed by laminating a wide metal terminal on the lower side and a metal terminal narrower than the lower metal terminal on the upper and lower sides, the laser welding structure of the present invention includes a diode and a relay. It is not restricted to what is used for the electronic component interior connector formed by connecting the upper metal terminal 2 such as a lead of an electronic component such as the lower metal terminal 3 attached to the housing 1.

また、図３及び図４に示した実施形態においては、上側金属端子２に臨む面１ｂのうち角度θで傾斜している部分（傾斜面）１ｂ’は、幅方向に横断する断面で見て直線状の平面で形成されている。しかし、この部分１ｂ’は、幅方向に横断する断面で見て下側金属端子３の幅方向端上縁Ｃとハウジング１の上面１ｃとの交点Ｌとを結ぶ線Ｓ１に対して下方向に凹状に湾曲していてもよい。   In the embodiment shown in FIGS. 3 and 4, a portion (inclined surface) 1 b ′ inclined at an angle θ of the surface 1 b facing the upper metal terminal 2 is seen in a cross section transverse to the width direction. It is formed by a straight plane. However, this portion 1b ′ is downward with respect to a line S1 connecting the upper edge C of the width direction end of the lower metal terminal 3 and the intersection L of the upper surface 1c of the housing 1 when viewed in a cross section transverse to the width direction. It may be curved in a concave shape.

更に、図１乃至図４に示す実施形態では、溝１ａを区画するハウジング１の壁の一部が下側金属端子３の側面に密接しているので、傾斜している部分１ｂ、１ｂ’の始点は下側金属端子３の幅方向上縁Ｃと一致している。しかし、ハウジング１の壁と下側金属端子３の側面との間にすき間があってもよい。この場合、傾斜している部分１ｂ、１ｂ’は、下側金属端子３の側面に最も近い稜線等を始点としてもよい。   Further, in the embodiment shown in FIGS. 1 to 4, since a part of the wall of the housing 1 that defines the groove 1a is in close contact with the side surface of the lower metal terminal 3, the inclined portions 1b and 1b ′ are formed. The starting point coincides with the upper edge C in the width direction of the lower metal terminal 3. However, there may be a gap between the wall of the housing 1 and the side surface of the lower metal terminal 3. In this case, the inclined portions 1 b and 1 b ′ may start from a ridge line or the like closest to the side surface of the lower metal terminal 3.

１ ハウジング
１ａ 溝
１ｂ 上側金属端子に臨む面
１ｂ’ 角度θで傾斜している部分
１ｃ ハウジングの上面
２ 上側金属端子
２ａ 上側金属端子の上面
３ 下側金属端子
DESCRIPTION OF SYMBOLS 1 Housing 1a Groove 1b Face which faces upper metal terminal 1b 'Part which inclines at angle (theta) 1c Upper surface of housing 2 Upper metal terminal 2a Upper surface of upper metal terminal 3 Lower metal terminal

Claims (5)

下側に幅広の金属端子を、上側に前記下側の金属端子よりも幅狭の金属端子を上下に重ねてレーザ溶接され、周囲のハウジングの上面が前記上側の金属端子の上面よりも高い状態で、前記上側及び下側の金属端子が前記ハウジングの溝内に配置されたレーザ溶接構造において、
前記溝の、前記上側の金属端子に臨む面が傾斜面を含み、該傾斜面は、前記下側の金属端子の側壁に最も近い前記傾斜面の始点と前記ハウジングの上面との交点とを結ぶ線と、前記下側の金属端子の上面からの延長線とのなす角度θで傾斜していることを特徴とするレーザ溶接構造。 Laser welding with a wide metal terminal on the lower side and a metal terminal narrower than the lower metal terminal on the upper and lower sides, and the upper surface of the surrounding housing is higher than the upper surface of the upper metal terminal In the laser welding structure in which the upper and lower metal terminals are disposed in the groove of the housing,
A surface of the groove facing the upper metal terminal includes an inclined surface, and the inclined surface connects an intersection of the starting point of the inclined surface closest to the side wall of the lower metal terminal and the upper surface of the housing. A laser welding structure characterized by being inclined at an angle θ formed by a line and an extension line from the upper surface of the lower metal terminal. 前記角度θが１５°以上７５°以下であることを特徴とする請求項１記載のレーザ溶接構造。   The laser welding structure according to claim 1, wherein the angle θ is not less than 15 ° and not more than 75 °. 前記溝の、前記上側の金属端子に臨む面のうち前記角度θで傾斜している前記傾斜面が、平面からみて前記上側及び下側の金属端子のレーザ溶接部分に対応する部分の位置のみに形成されていることを特徴とする請求項１又は２記載のレーザ溶接構造。   Of the surface of the groove facing the upper metal terminal, the inclined surface that is inclined at the angle θ is only at the position corresponding to the laser welded portion of the upper and lower metal terminals as seen from the plane. The laser welding structure according to claim 1 or 2, wherein the laser welding structure is formed. 前記溝の、前記上側の金属端子に臨む面は、下方向に凹状に湾曲していることを特徴とする請求項１乃至３のうちいずれか一項に記載のレーザ溶接構造。   The laser welding structure according to any one of claims 1 to 3, wherein a surface of the groove facing the upper metal terminal is concavely curved downward. 前記溝の、前記上側の金属端子に臨む面のうち前記角度θで傾斜している前記傾斜面が、平面からみて凹状に湾曲していることを特徴とする請求項３記載のレーザ溶接構造。   4. The laser welding structure according to claim 3, wherein the inclined surface inclined at the angle θ of the surface of the groove facing the upper metal terminal is curved in a concave shape when viewed from a plane.
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